Successful Reconstruction of Complex Sacrococcygeal Defects Using Chimeric Perforator Propeller Flap.

Abstract

Complex soft tissue defects, which result from the surgical resection of sacral tumors, manifest as a combination of skin defects, dead space, infection, and prosthesis exposure. Because the traditional musculocutaneous flap lacks flexibility because of the close connection between the skin flap and the muscle component, the musculocutaneous flap is not suitable for reconstructing complex soft tissue defects where the dead space and skin defects are located at different sites. Furthermore, the perforator flap is also not appropriate for reconstructing complex defects because it lacks the muscular component. We considered the possibility of using the chimeric perforator propeller flap for reconstructing complex sacrococcygeal defects. This study included 7 patients who underwent, between July 2007 and July 2021, the reconstruction of complex soft tissue defects of the sacrococcygeal region using a chimeric perforator propeller flap. Among the included cases, the etiologies were chordoma (n = 3), sacral tumor (n = 3), and squamous cell carcinoma (n = 1). In all the cases, vacuum-assisted closure therapy was used to treat wound infections before surgery. The average sizes of the skin and muscle flaps were 195.8 cm 2 (range, 100-350 cm 2 ) and 83.6 cm 2 (range, 60-140 cm 2 ), respectively. The superior gluteal artery was the source artery for the chimeric perforator propeller flap. The donor sites were primarily closed in all cases. One patient had delayed wound healing, and the secondary wound healed using conservative dressing changes. The other 6 flaps had no complications. The average follow-up time was 5.3 months (range, 1-9 months). Muscle weakness and compromised ambulation in the affected lower extremities were not observed in any of the patients. Furthermore, all 7 patients had no tumor recurrence, prosthesis exposure, and infection events in the sacrococcygeal region. The chimeric perforator propeller flap may be an option for reconstructing complex soft tissue defects in the sacrococcygeal region.